CHICAGO -- Chicago Mayor Rahm Emanuel wants to sell advertising space on vending machines at city facilities as part of his 2012 budget plan to raise $25 million from marketing the city.

His administration solicited marketing firms to help the city identify opportunities and negotiate contracts with potential advertisers. The city has already begun selling advertising space on its bridges and public buildings and is looking to expand the opportunity to vending machines, trash cans and flyers mailed with water bills, along with sponsorships of public events.

The mayor is also considering selling ad space on the city's website, snowplows, overpasses, control boxes and street-sweeping vehicles.

Emanuel leased space earlier this month on the historic Wabash Avenue bridge houses overlooking the Chicago River. Bank of America is the site's first advertiser on the buildings' walls. The city says it has raised $4,500 from the campaign, which lasts through Dec. 12.

The city's broader marketing plan breaks its public assets into six categories: vending and product licensing, physical property, the city's website and mail.

"The mayor and his administration are exploring any and all innovative options that will bring new revenue into the city to avoid reductions in services the city delivers and any additional financial strains on Chicago taxpayers," said Lois Scott, the city's chief financial officer. "The city has numerous, diverse places and things to market, and we're ready to work together under the right set of guidelines to market what Chicago has to offer."